信号到PDA的约束无法使用DCM模块

我们没有严格要求信号延迟到垫，但我担心，如果我遇到这样的问题，将来，我该如何解决它。
这就是器件系列数据表的用途。
您的问题是用作计时参考的内容。
你在比较两个输出信号的相对时间吗？
您是否将输出信号的时序与输入信号进行比较？
- 鲍勃埃尔金德
签名：新手的自述文件在这里：http：//forums.xilinx.com/t5/New-Users-Forum/README-first-Help-for-new-users/td-p/219369总结：1。
阅读手册或用户指南。
你读过手册了吗？
你能找到手册吗？2。
搜索论坛（并搜索网页）以寻找类似的主题。
不要在多个论坛上发布相同的问题。
不要在别人的主题上发布新主题或问题，开始新的主题！5。
学生：复制代码与学习设计不同.6“它不起作用”不是一个可以回答的问题。
提供有用的详细信息（请与网页，数据表链接）.7。
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如果我写一篇好文章，那么我一无所获。
在原帖中查看解决方案



以下为原文

we don't strictly request the signal delay to the pad, but I afraid that if I meet the question such as that in the future , how can i resolve it.
 
That's what the device family datasheet is for.
 
Your problem is what to use as a timing reference.

• Are you comparing the relative timing of two output signals?
  
• Are you comparing the timing of an output signal to an input signal?
  

-- Bob Elkind
SIGNATURE:
README for newbies is here: http://forums.xilinx.com/t5/New-Users-Forum/README-first-Help-for-new-users/td-p/219369

Summary:
1. Read the manual or user guide.  Have you read the manual? Can you find the manual?
2. Search the forums (and search the web) for similar topics.
3. Do not post the same question on multiple forums.
4. Do not post a new topic or question on someone else's thread, start a new thread!
5. Students: Copying code is not the same as learning to design.
6 "It does not work" is not a question which can be answered. Provide useful details (with webpage, datasheet links, please).
7. You are not charged extra fees for comments in your code.
8. I am not paid for forum posts.  If I write a good post, then I have been good for nothing.View solution in original post

您使用的是哪个FPGA器件系列？
你要加多少延迟？
这是一个定制的电路板设计吗？
这是一个学校项目吗？
设计中输入时钟和内部时钟的时钟频率是多少？
您是否尝试将内部时钟输出到输出引脚？
- 鲍勃埃尔金德
签名：新手的自述文件在这里：http：//forums.xilinx.com/t5/New-Users-Forum/README-first-Help-for-new-users/td-p/219369总结：1。
阅读手册或用户指南。
你读过手册了吗？
你能找到手册吗？2。
搜索论坛（并搜索网页）以寻找类似的主题。
不要在多个论坛上发布相同的问题。
不要在别人的主题上发布新主题或问题，开始新的主题！5。
学生：复制代码与学习设计不同.6“它不起作用”不是一个可以回答的问题。
提供有用的详细信息（请与网页，数据表链接）.7。
您的代码中的评论不需要支付额外费用。
我没有支付论坛帖子的费用。
如果我写一篇好文章，那么我一无所获。



以下为原文

Which FPGA device family are you using?
How much delay do you want to add?
Is this a custom board design?
Is this a school project?
What are the clock frequencies of the input clocks and the internal clocks in your design?
Are you trying to output an internal clock to an output pin?
 
-- Bob Elkind
SIGNATURE:
README for newbies is here: http://forums.xilinx.com/t5/New-Users-Forum/README-first-Help-for-new-users/td-p/219369

Summary:
1. Read the manual or user guide.  Have you read the manual? Can you find the manual?
2. Search the forums (and search the web) for similar topics.
3. Do not post the same question on multiple forums.
4. Do not post a new topic or question on someone else's thread, start a new thread!
5. Students: Copying code is not the same as learning to design.
6 "It does not work" is not a question which can be answered. Provide useful details (with webpage, datasheet links, please).
7. You are not charged extra fees for comments in your code.
8. I am not paid for forum posts.  If I write a good post, then I have been good for nothing.

我使用的是旧系列FPGA XCV300（顶点）。
输入时钟20 MHZ，内部时钟2MHZ。
我没有将内部时钟插入输出引脚。
我们没有严格要求信号延迟到垫，但我担心，如果我遇到这样的问题，将来，我该如何解决它。



以下为原文

I am using a old family FPGA XCV300 (vertex) . input clock 20 MHZ, internal clock 2MHZ. I don't put the internal clock to an out pin. we don't strictly request the signal delay to the pad, but I afraid that if I meet the question such as that in the future , how can i resolve it.

我们没有严格要求信号延迟到垫，但我担心，如果我遇到这样的问题，将来，我该如何解决它。
这就是器件系列数据表的用途。
您的问题是用作计时参考的内容。
你在比较两个输出信号的相对时间吗？
您是否将输出信号的时序与输入信号进行比较？
- 鲍勃埃尔金德
签名：新手的自述文件在这里：http：//forums.xilinx.com/t5/New-Users-Forum/README-first-Help-for-new-users/td-p/219369总结：1。
阅读手册或用户指南。
你读过手册了吗？
你能找到手册吗？2。
搜索论坛（并搜索网页）以寻找类似的主题。
不要在多个论坛上发布相同的问题。
不要在别人的主题上发布新主题或问题，开始新的主题！5。
学生：复制代码与学习设计不同.6“它不起作用”不是一个可以回答的问题。
提供有用的详细信息（请与网页，数据表链接）.7。
您的代码中的评论不需要支付额外费用。
我没有支付论坛帖子的费用。
如果我写一篇好文章，那么我一无所获。



以下为原文

we don't strictly request the signal delay to the pad, but I afraid that if I meet the question such as that in the future , how can i resolve it.
 
That's what the device family datasheet is for.
 
Your problem is what to use as a timing reference.

• Are you comparing the relative timing of two output signals?
  
• Are you comparing the timing of an output signal to an input signal?
  

-- Bob Elkind
SIGNATURE:
README for newbies is here: http://forums.xilinx.com/t5/New-Users-Forum/README-first-Help-for-new-users/td-p/219369

Summary:
1. Read the manual or user guide.  Have you read the manual? Can you find the manual?
2. Search the forums (and search the web) for similar topics.
3. Do not post the same question on multiple forums.
4. Do not post a new topic or question on someone else's thread, start a new thread!
5. Students: Copying code is not the same as learning to design.
6 "It does not work" is not a question which can be answered. Provide useful details (with webpage, datasheet links, please).
7. You are not charged extra fees for comments in your code.
8. I am not paid for forum posts.  If I write a good post, then I have been good for nothing.